There are pedals can also play a role in protecting the side skirt, such as you through a narrow section, accidentally rub on the skirt, there are pedals, will not damage the skirt. The repair of the hemline requires higher requirements.
Otherwise it will rust through. Of course, there is also the possibility that the original rub, just added pedal rub on the possibility, this wants you to distinguish the pros and cons, and then decide whether to install.